# MTX_Frustum

## C Specification

      #include <nitro/fx/fx_mtx44.h>

      void MTX_Frustum(
          fx32        t,
          fx32        b,
          fx32        l,
          fx32        r,
          fx32        n,
          fx32        f,
          MtxFx44*    mtx );

## Description

This function sets a frustum matrix to `*mtx`. It uses the Divider. The following diagram shows the matrix that is set.

## Arguments

`t` | Y coordinate at the top of the near clipping plane
`b` | Y coordinate at the bottom of the near clipping plane
`l` | X coordinate at the left of the near clipping plane
`r` | X coordinate at the right of the near clipping plane
`n` | The distance from the eyepoint to the near clipping plane
`f` | The distance from the eyepoint to the far clipping plane
`mtx` | Pointer to a 4x4 matrix

## Return Values

None

## See Also

`G3_Frustum`, `MTX_Perspective`, `MTX_Ortho`

## Revision History

04/27/2004 Initial Version